Often called the "happiness hormone," serotonin is a neurotransmitter involved in regulating mood, sleep, appetite, and pain perception. Produced in both the brain and primarily in the gut, it is synthesized from tryptophan, an amino acid obtained through diet. An imbalance can result in irritability, sleep disturbances, or persistent fatigue.
Its production relies on a precise biological mechanism: tryptophan is first transformed into 5-hydroxytryptophan, then converted into serotonin by several enzymes, with the help of micronutrients such as vitamin B6, magnesium, and iron. Eggs, dairy products, poultry, legumes, and certain fruits and whole grains are among the main dietary sources of tryptophan.
Nutrition and emotional balance
Beyond tryptophan, other nutrients play a role in regulating neurotransmitters. Magnesium is involved in nerve transmission, vitamin B6 is involved in the conversion of 5-HTP to serotonin, while zinc, copper, and calcium contribute to the proper functioning of the nervous system. Omega-3 fatty acids found in oily fish support the fluidity of neuronal membranes, and probiotics can promote a gut microbiota conducive to serotonin synthesis.
Conversely, excessive consumption of refined sugars, alcohol, or ultra-processed foods can disrupt the regulation of this neurotransmitter, notably by affecting the gut microbiota or causing significant blood sugar fluctuations. Lack of sleep and chronic stress are also associated with impaired serotonin production.
Certain plants and dietary supplements, such as saffron, ashwagandha, and rhodiola, are being studied for their potential effect on emotional balance. However, their use should be supervised, particularly when taking antidepressants, due to possible interactions. Experts emphasize that a balanced diet, regular physical activity, and effective stress management are the primary ways to naturally support the biological mechanisms involved in mood regulation.
